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HD 100428


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UBV polarimetry of 361 A- and F-type stars in selected areas
We present simultaneous UBV linear polarization measurements for 361 A-and F-type stars with accurate colour excess and distance determination.These stars are distributed in 35 Kapteyn's Selected Areas, covering thethird and fourth quadrants of the galactic plane (|b| <= 30degr ).The obtained polarization and the known colour excess are compared. Ananalysis of the polarization distribution as a function of the stellardistance is also performed. Based on observations collected at theEuropean Southern Observatory (ESO), La Silla, Chile.

Walraven photometry of nearby southern OB associations
Homogeneous Walraven (VBLUW) photometry is presented for 5260 stars inthe regions of five nearby southern OB associations: Scorpio Centaurus(Sco OB2), Orion OB1, Canis Major OB1, Monoceros OB1, and Scutum OB2.Derived V and (B - V) in the Johnson system are included.

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Osservazione e dati astrometrici

Costellazione:Centauro
Ascensione retta:11h32m55.12s
Declinazione:-60°16'48.4"
Magnitudine apparente:9.108
Moto proprio RA:-3.3
Moto proprio Dec:-26.4
B-T magnitude:9.608
V-T magnitude:9.15

Cataloghi e designazioni:
Nomi esatti   (Edit)
HD 1989HD 100428
TYCHO-2 2000TYC 8972-670-1
USNO-A2.0USNO-A2 0225-11604793
HIPHIP 56333

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